local U = require "scriptbank\\utillib"
local Q  = require "scriptbank\\quatlib"
local rad   = math.rad
local deg   = math.deg 
local floor = math.floor
local atan  = math.atan2
local abs   = math.abs
local sqrt  = math.sqrt
local rotx = {}
local rotz = {}
local maxX = {}
local minX = {}
local maxZ = {}
local minZ = {}
local swingingX = {}
local swingingZ = {}
local light = {}
lightName = {}

local facingNorth = {}
local facingEast = {}
local facingUp = {}

function swinging_light_init_name(e,name)
	--[[
	set to 1 if you want the light facing that direction, set to -1 if facing opposite, set to 0 if not facing either
	i.e. if facing north (GG default direction) set as;
	facingNorth[e] = 1
	facingEast[e] = 0
	facingUp[e] = 0
	but if you want the light to face towards the ground set as;
	facingNorth[e] = 0
	facingEast[e] = 0
	facingUp[e] = -1
	--]]
	facingNorth[e] = 0
	facingEast[e] = 0
	facingUp[e] = -1
	rotx[e] = 1
	rotz[e] = 0
	minX[e] = -25
	maxX[e] = 25
	--[[
	set swinging x / z to 1 or -1 to make the light swing in that direction (depends on GG's default rotation facing)
	so a light facing north by default that you want to swing back and forth should be set as;
	swingingX[e] = -/+ 1
	--]]
	swingingX[e] = math.random(0,1)
	if swingingX[e] == 0 then swingingX[e] = -1 end
	CollisionOff(e)
	lightName[e] = name
	light[e] = nil
end 

function swinging_light_main(e)
	if light[e] == nil then 
		for a,_ in pairs (isLight) do 
			if lightName[e].."_light" == lightName[a] then 
				light[e] = GetEntityLightNumber( a )
				break
			end 
		end 
		if light[e] == nil then 
			PromptLocal(e,"no light found")
			return 
		end 
	end
	
	local tempx = g_Entity[e]['anglex']
	local tempz = g_Entity[e]['anglez']
	local tempy = g_Entity[e]['angley']
	if rotx[e] > 0 then 
		tempx = tempx+swingingX[e]
		if tempx < minX[e] or tempx > maxX[e] then 
			swingingX[e] = swingingX[e]*-1
		end 
	end 
	if rotz[e] > 0 then 
		tempz = tempz+swingingZ[e]
		if tempz < minZ[e] or tempz > maxZ[e] then
			swingingZ[e] = swingingZ[e]*-1
		end 
	end 
	SetRotation(e,tempx,tempy,tempz)
	local rad = math.rad
	local xv, yv, zv = U.Rotate3D( facingEast[e], facingUp[e], facingNorth[e], rad( tempx ), rad( tempy ), rad( tempz ) )
	SetLightAngle( light[e], xv, yv, zv )
	--Prompt(GetLightAngle(light[e]))

end